BookStack before 26.09.3 Broken Access Control via ImageController

BookStack before 26.09.3 contains a missing authorization vulnerability in ImageController::checkImagePermission() that allows authenticated non-admin users to bypass page-level content restrictions for images whose owning page has been moved to the recycle bin, because the permission check relies on Page::getPage() which returns null for soft-deleted pages and silently skips the PageView check. Attackers can enumerate sequential image IDs via GET /images/edit/{id} to disclose metadata of restricted images, and users with image-update-all/image-delete-all privileges can rename, replace, or permanently delete images belonging to content they cannot view, persisting the damage even after the page is restored.

BookStack before 26.09.3 Incorrect Authorization via Image and Drawio Endpoints

BookStack before 26.09.3 contains an incorrect authorization vulnerability that allows authenticated users to access other users' unpublished draft page images by checking only PageView permission without draft status. Attackers can read drawio data via the base64 endpoint or rename, replace, or delete draft images by sequential ID to disclose or tamper with unpublished work.

BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages

BookStack before 26.09.2 contains an incorrect authorization vulnerability in AttachmentController that allows authenticated users to access other users' draft page attachments by ID. Attackers with attachment permissions can enumerate sequential attachment IDs to download, rename, relink, or replace files on another user's unpublished draft pages.

BookStack < 26.05.5 Authentication Bypass via Social Login Provider Confusion

BookStack before 26.05.5 contains an authentication bypass vulnerability in its social login implementation that allows unauthenticated attackers to sign in as arbitrary users by authenticating through a different social provider sharing the same driver_id namespace. Attackers can authenticate at one enabled social provider using a user ID that matches an account linked to a different social provider, bypassing credential verification entirely because the SocialAuthService::handleLoginCallback query ignores the driver column when retrieving linked account records.

BookStack < 26.05.4 Broken Access Control via Image Gallery API

BookStack before 26.05.4 contains a broken access control vulnerability that allows authenticated API users with image-update or image-delete permissions to manipulate other users' avatars by exploiting missing content-type restrictions in the Image Gallery API endpoints. Attackers can supply a user avatar's ID to the API controller, which loads any image type without the web controller's gallery and drawio restrictions, and when the avatar's uploaded_to field matches a page ID accessible to the attacker, the authorization check passes allowing the attacker to rename, replace, or delete the target user's avatar without requiring user-management permission.

BookStack before 26.05.4 Stored XSS via Drawing Upload

BookStack before 26.05.4 contains a stored cross-site scripting vulnerability in the drawing upload endpoint that accepts unvalidated base64 content and stores it without content inspection. Attackers with editor permissions can upload SVG files containing scripts that execute in administrator browsers when accessed through the image gallery API without content-type validation or CSP headers.

BookStack before 26.05.4 Remote Code Execution via Book Cover

BookStack before 26.05.4 contains a remote code execution vulnerability in the portable ZIP import functionality that allows users with Import Content and Create Books permissions to upload a PHP polyglot file as a book cover. Attackers can bypass image extension validation by embedding a PHP file with a .php filename in the ZIP archive, which is stored in the public web root and executed by unauthenticated requests.

BookStackApp BookStack Chapter Export ExportFormatter.php chapterToMarkdown access control

A weakness has been identified in BookStackApp BookStack up to 26.03. Affected is the function chapterToMarkdown of the file app/Exports/ExportFormatter.php of the component Chapter Export Handler. Executing a manipulation of the argument pages can lead to improper access controls. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 26.03.1 is able to address this issue. This patch is called 8a59895ba063040cc8dafd82e94024c406df3d04. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Book Stack v23.10.2 - LFR via Blind SSRF

Book Stack version 23.10.2 allows filtering local files on the server. This is possible because the application is vulnerable to SSRF.

Cross-site scripting vulnerability in BookStack versions prior to v22.09 allows a remote authenticated attacker to inject an arbitrary script.

Server-Side Request Forgery (SSRF) in bookstackapp/bookstack

Server-Side Request Forgery (SSRF) in GitHub repository bookstackapp/bookstack prior to v23.08.

Cross-site Scripting (XSS) - Stored in bookstackapp/bookstack

Cross-site Scripting (XSS) - Stored in GitHub repository bookstackapp/bookstack prior to v22.02.3.

Improper Access Control in bookstackapp/bookstack

bookstack is vulnerable to Improper Access Control

Improper Access Control in bookstackapp/bookstack

bookstack is vulnerable to Improper Access Control

Improper Access Control in bookstackapp/bookstack

bookstack is vulnerable to Improper Access Control

Cross-Site Request Forgery (CSRF) in bookstackapp/bookstack

bookstack is vulnerable to Cross-Site Request Forgery (CSRF)

Path Traversal in bookstackapp/bookstack

bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack

bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type

Unrestricted Upload of File with Dangerous Type in bookstackapp/bookstack

bookstack is vulnerable to Unrestricted Upload of File with Dangerous Type

Path Traversal in bookstackapp/bookstack

bookstack is vulnerable to Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')